NEW! Data443 Acquires Vaikora – Real-Time AI Runtime Control & Enforcement for AI Agent
A2A is the Linux Foundation Agent-to-Agent protocol, version 1.0 ratified in Q1 2026 with more than 150 participating organizations. The protocol defines how AI agents communicate across organizational and tenant boundaries: identity, capability discovery, task delegation, and result handoff. The security model is still being formalized; runtime control products including Vaikora are positioned as the enforcement layer for A2A traffic.
Multi-agent systems are no longer hypothetical. A customer-support agent at one vendor may hand off a billing question to a finance agent at a partner vendor, which may in turn query a tax agent at a third vendor. Without a common protocol, every pairwise integration is bespoke. A2A defines the contract so any two A2A-compliant agents can interact.
The security implications are large. Cross-tenant trust, capability scoping, and audit chains all need protocol-level conventions or the security work happens after the fact. Vaikora is one of the early enforcement-layer participants in the A2A working group.
A2A is a peer-to-peer agent protocol. MCP is an agent-to-tool protocol. The two are complementary: a single agent may use MCP to call its own tools and A2A to delegate to other agents.
An AI procurement agent at a buyer organization sends an A2A task to a vendor’s quoting agent, asking for a price on a specific configuration. The vendor agent responds with a quote, signed with its tenant identity. A second example: a SOC triage agent delegates threat-intelligence enrichment to a third-party CTI agent over A2A, receives signed enrichment data, and attaches it to the alert before escalating.
Yes. The Linux Foundation ratified v1.0 in Q1 2026. The working group includes more than 150 organizations across AI vendors, enterprises, and standards bodies.
A2A defines identity primitives that agents present at handoff, including signed tenant identity, capability tokens, and chain-of-custody metadata. Implementations are still maturing; Vaikora layers policy enforcement on top of the protocol-level identity.
No. A2A matters when agents need to interact across tenant boundaries. Single-tenant agent systems usually do not need A2A; they communicate over internal RPC or message queues.
Vaikora is the runtime enforcement layer for A2A traffic. It evaluates incoming A2A tasks against your policy, signs decisions into the audit chain, and emits the standard A2A result envelope back to the calling agent.
Last updated: 2026-05-20.
